Proofread the cookbook

various fixes, here are the squashed commit messages :
- use first person on each item
- consistency is important.
- remove abbreviations
- add missing article
- avoid long lines
- use better verb
- invert words
- fixes a syntax issue
- whitespace
- remove s
- No s after a word already ending with an s when using saxon genitive
- rephrase
- fix sentence
- be consistent with the following bullet item
- add missing closing parenthesis
- use inline literals for methods
- fix from <=> since confusion
- grammar
- put the link on a part of the sentence
Merge pull request #2281 from greg0ire/doc_improvements

Proofread the cookbook. Say squash if you're ok with every commit.